
#fondo{
background-image:url(lo.png);
background-repeat: no-repeat;
background-position:center;
width: 100%;
height: 100%;
left: 0%;
top: 0%;
right: 0%;

}
#tren{
    position: absolute;
    top: 69%;
    left: 0%;
    width: 20%;
    height: 30%;
    background-image: url(tren.gif);
    background-repeat: no-repeat;
    background-position:center;
    z-index: 6;
}